This issue started with SU5: when you right click and hold to pan the camera inside the cockpit the sim doesn’t detect inputs given by throttle/stick/yoke etc.
Related bug that has been logged since forever: Freelook with mouse causes controls to freeze after SU5
My guess is it’s another annoying issue brought to PC by Xbox changes. Freelook (hold) on Xbox allows the left controller joystick to translate the camera position, instead of flying the plane.
That’s true. The bug was introduced in sim update 5.
Yes, the SU5/Xbox release caused many problems, many of which have not been resolved as yet.